EP1416160A2 - Installation pour surveiller la position d'un piston - Google Patents

Installation pour surveiller la position d'un piston Download PDF

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Publication number
EP1416160A2
EP1416160A2 EP03450229A EP03450229A EP1416160A2 EP 1416160 A2 EP1416160 A2 EP 1416160A2 EP 03450229 A EP03450229 A EP 03450229A EP 03450229 A EP03450229 A EP 03450229A EP 1416160 A2 EP1416160 A2 EP 1416160A2
Authority
EP
European Patent Office
Prior art keywords
piston
sensor
cylinder
sensor element
monitor according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03450229A
Other languages
German (de)
English (en)
Other versions
EP1416160A3 (fr
Inventor
Bernhard Spiegel
Peter Steinrück
Jürgen Murhammer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoerbiger Kompressortechnik Holding GmbH
Original Assignee
Hoerbiger Kompressortechnik Holding GmbH
Hoerbiger Kompressortechnik Services GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hoerbiger Kompressortechnik Holding GmbH, Hoerbiger Kompressortechnik Services GmbH filed Critical Hoerbiger Kompressortechnik Holding GmbH
Publication of EP1416160A2 publication Critical patent/EP1416160A2/fr
Publication of EP1416160A3 publication Critical patent/EP1416160A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2201/00—Pump parameters
    • F04B2201/02—Piston parameters
    • F04B2201/0201—Position of the piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2201/00—Pump parameters
    • F04B2201/02—Piston parameters
    • F04B2201/0205—Piston ring wear

Definitions

  • the invention relates to a monitor for monitoring the position of the movement path of a reciprocating piston relative to the cylinder surrounding it, with one relative to the cylinder in the Area of one of the dead centers of the piston movement arranged stationary, and with a Evaluation unit connected sensor, and one in the area of the front of the Piston arranged indicator unit, which is in the region of the dead center of the piston movement in a detectable by the sensor and by the evaluation unit for determination the relative position of the movement path of the piston evaluable lateral distance to the sensor.
  • From JP-62-151703 A is also a method or device of the aforementioned Kind known, which has a principle accuracy advantage because of a possible Contact between the piston and the inner wall of the cylinder in reciprocating machines of those of interest here Generally takes place first at the outer end of the piston on the cover side, with which the determination of the radial displacement of the piston or a permanently connected one Component (such as the piston rod protruding through the piston) in the area of the associated Dead center of the trajectory in a substantially orthogonal to the piston axis Level has fundamental advantages.
  • an optical sensor is provided in the cylinder head, which detects the reflection of a evaluates an indicator unit on the end face of the piston rod directed light beam, which of concentrically arranged depressions and elevations of the indicator unit when emigrating the same is reflected accordingly modified.
  • the senor is also the one at the Measuring point prevailing unfavorable environmental conditions (pressure, temperature, corrosion and the like) exposed, which in practice besides the problems with sealing the outward through hole for the sensor in the cylinder head also the The life of such arrangements is greatly reduced or the area of application is greatly restricted.
  • the object of the present invention is an arrangement of the aforementioned Art to improve so that the disadvantages of the known arrangement described avoided and in particular in a simple and robust way the position of the trajectory of the reciprocating piston relative to the cylinder or their spatial change can be used to reliably determine the distance between the piston and the surrounding cylinder wall to enable.
  • This object is achieved according to the present invention in an arrangement of the beginning mentioned type in that the sensor relative to the inner surface of the cylinder arranged withdrawn and sealed by means of a cover to the cylinder space and that the indicator unit is considered an insensitive to pollution anomaly is trained.
  • the sensor elements are trained to work according to different measuring principles. This enables the monitoring monitor specifically tailored to the task at hand - it can for example eddy current sensors combined with inductive or capacitive sensors are used, the advantages and disadvantages of the individual measuring principles specifically for the respective application can be combined or compensated.
  • the indicator unit is designed as a spatial anomaly in the area of the end face of the piston is whose relative lateral distance to at least two, preferably as eddy current sensors trained sensor elements from the evaluation unit for determining the spatial Position of the dead center of the movement path of the piston can be evaluated.
  • the said spatial anomaly for example as a protruding cone, pot-like depression or the like on the end face of the piston or on the end face protruding through the piston the piston rod can be formed.
  • the indicator unit but also at least one, preferably with the formation of a smooth surface in the Region of the end face of the piston or the piston rod, wherein at least one of the sensor elements as a magnetic field sensor that the Converts the detected magnetic field lines into a measurement signal.
  • This arrangement also enables precise and meaningful measurements of the spatial Location of the end point of the movement path of the piston relative to the cylinder with simple and agents insensitive to the prevailing environmental conditions.
  • the sensor element (s) is / are in a particularly preferred embodiment of the Invention arranged in an adapter inserted in the cylinder head sealed. This makes possible the use of special materials or special seals and the like for the sensor mount or the provision of easily mountable and interchangeable Call Monitor units.
  • At least one, preferably separately attached Measurement approach arranged as a spatially protruding indicator unit, in the area of the dead center the movement path of the piston in at least one sealed to the outside Cylinder head immersed as an adapter, in which at least one laterally sensor element directed to the measurement approach is arranged.
  • the measurement approach appears in the Area of the dead center of the movement path of the piston in the measuring cartridge, what on The simplest way is also to use this monitoring monitor as a dead center sensor allowed. Since the measurement signal of, for example, an eddy current sensor is not in the Measuring cartridge immersed measuring approach (and especially if the piston is in the area the other, bottom dead center of the trajectory) is practically the case of the infinite Distance between the sensor element and the measurement approach corresponds to a Such an arrangement very easily also temperature compensation by comparing the Measured value made with the sensor signal with the piston at bottom dead center become.
  • the measurement approach can at least in the area in the area of the dead center Movement path of the piston opposite the sensor element (s), in the form of a Cylinder can be formed with generators lying parallel to the piston axis, the Sensor element (s) essentially the radial distance in a normal to the piston axis Level captured (capture). This results in a symmetrical structure of the arrangement if necessary or enables simple and easy to assemble and maintain the training of Surveillance monitor.
  • the measuring cartridge can at least a receiving body open to the cylinder space for the sealed to the cylinder space
  • the receiving body or at least the membrane-like area of the same made of plastic, preferably fiber-reinforced, educated.
  • This receiving body can then be relatively simple in turn in the cylinder head be used and sealed, which means construction, assembly and maintenance of the monitoring monitor very simplified and the subsequent attachment of such Monitors, for example on a reciprocating compressor, are very simplified.
  • the / each sensor element in the receiving body is essentially hollow and the receiving body so that it is arranged to support the cylinder pressure from the inside.
  • Fig. 1 shows a partial section through a Reciprocating compressor (equipped with a monitoring monitor according to the invention) in the area of a cylinder head with the piston at top dead center
  • Fig. 2 a partial Section along the line II - II in Fig. 1, Fig. 3, the arrangement of Figs. 1 and 2 in the state the advanced wear of the support ring on the piston
  • Fig. 4 shows another embodiment according to the invention in a representation corresponding to FIGS. 1 and 3
  • Fig. 5 shows the section V-V in Fig. 4
  • Fig. 6 shows a detail from another embodiment 7 shows a detail section along the line VII-VII in FIG. 6, FIG. 8
  • Another embodiment according to the invention in an example corresponding to FIG. 6 9 and the schematic representation of different piston positions an arrangement according to FIGS. 1 to 3 with exemplary measurement results of the monitoring monitor.
  • All of the arrangements shown serve as a monitor for monitoring the position of the Path of movement of a piston 1 relative to the cylinder 2 surrounding it and have one relative to the cylinder 2 in the area of the top dead center of the movement of the piston 1 stationary arranged, via a connecting cable 3 with an evaluation unit, not shown here related sensor 4 and one on the piston 1 or on a fixed connected component, such as the piston rod 5, arranged indicator unit 6, which in the area of the dead center of the movement of the piston 1 in one of the sensors 4 detectable and thus by the evaluation unit to determine the relative position of the Movement path of the piston 1 is evaluable lateral distance a to the sensor 4.
  • the senor 4 is relative to the inner surface of the cylinder 2 (or here cylinder head 7) arranged withdrawn and by means of a membrane Cover 8 sealed to the cylinder interior 9.
  • the indicator unit 6 is as Contamination-insensitive anomaly 10 is formed in the area of the end face 11 of the piston 1.
  • This Measuring approach 13 appears in the area of the top dead center of the movement path shown of the piston 1 in an outwardly sealed in the cylinder head 7 used as an adapter Measuring cartridge 15, in which, as sensor 4, a single one directed laterally onto measuring shoulder 13 Sensor element 16, for example designed as an eddy current sensor, is arranged.
  • the measuring approach 13 is at the dead center of the movement path of the piston 1 the sensor element 16 side with a flat, substantially vertical surface aligned to the connecting line to the sensor element 16, such as this can be seen in particular from FIG. 2.
  • the measuring cartridge 15 has a receiving body 17 that is open toward the cylinder space 9 for receiving the sensor element 16 sealed to the cylinder space 9, at least in the area lying between sensor element 16 and immersed measuring attachment 13 membrane-thin as cover 8 from the sensor sensitivity or little influence Material is formed.
  • the one here in the receiving body 17 of the measuring cartridge 15 membrane carrier 18 inserted from the side open to the cylinder interior 9 For example, made of fiber-reinforced plastic and by means of a screw 19 in Receiving body 17 attached.
  • a sensor carrier 20 is in the receiving body from the outside 17 or the membrane carrier 18 inserted together with the inserted Sensor 4 or sensor element 16 the receiving body 17 substantially without a cavity fills and thus supports from the inside against the cylinder pressure, with which the membrane-like cover 8 relatively thin and thus the measurement signal of the sensor 4 is not or can be designed to have very little influence.
  • the measuring cartridge 15 is inserted into the corresponding bore from the inside of the cylinder of the cylinder head 7 inserted and fastened on the outside by means of a nut 21. Together with the simple design and attachment of the measuring approach 13 to the piston 1 or the piston rod 5 is the subsequent equipment, for example one Piston compressor possible with the monitoring monitor according to the invention.
  • the double-acting piston 1 here has two pairs of piston rings 22 which are used for Seal the inner wall of the cylinder 2 and thus the one arranged in the bores 23, Suction and pressure valves (not shown here) controlled suction and compression of working medium. Between the pairs of piston rings 22 is a support ring 24 arranged from material that wears out over time (for example plastic) exists, with which the piston 1 of the arrangement executed here with lying cylinders from the original position shown in FIG. 1 to the position shown in FIG. 3 decreases. This decrease in the path of movement of the piston 1 is achieved by means of the invention Monitoring monitor in the form of the distance a (see Fig. 2) between the measurement approach 13 and sensor element 16 monitors. If the distance falls below a limit a or the distance between the underside of the piston 1 and the adjacent inner wall of cylinder 2, can either issue a maintenance signal or the compressor also be switched off for safety reasons.
  • the measurement approach 13 already in the sensitivity range of the sensor element 16, which one subsequently corresponds to a rapidly increasing measurement signal that corresponds to the area of the complete Coverage of the measurement approach 13 and sensor element 16 is a relatively flat one Maximum reached. It can therefore be used to measure or monitor the the relative distance between the measurement approach 13 and the sensor element 16 corresponding measurement signal take place - with further approach between the measuring approach 13 and the sensor element 16 (as shown in Fig. 3), the maximum value of the measurement signal increases to easily observable Way, what a monitoring of the position of the movement path of the piston with great accuracy allowed.
  • 6 to 8 are several, perpendicular to the piston axis 25 spaced, separate from the again not shown evaluation unit interrogable sensor elements 16, 16 'are provided, which is simple and meaningful the determination or monitoring of the position of the movement path of the piston 1 in any Direction relative to the cylinder, not shown here.
  • 6 and 7 are three identical sensor elements 16 grouped symmetrically about the piston axis 25 (for example Eddy current sensors) are provided, which determine the location of a spatial anomaly 10 (in Shape of a turn) on the front side of the piston rod 5.
  • the signal of the Sensor elements 16 are preferably calibrated beforehand in such a way that the size is then derived from them and direction of migration of the piston axis 25 relative to the cylinder 2 or its Inner wall can be determined.
  • the indicator unit 6 has a smooth surface in the area of the end face of the piston rod 5 used magnetic element 27, the one designed as a magnetic field sensor element 16 'of the sensor 4, which the Inclination of the detected magnetic field lines converts into a measurement signal.
  • the further sensor element 16 can, for example, in turn be used as an eddy current sensor for determination the distance of the end face of the piston rod 5 in the area of top dead center the piston movement. This also allows the spatial position of the trajectory of the piston 1 can be determined relative to the cylinder 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Actuator (AREA)
  • Compressor (AREA)
EP03450229A 2002-10-30 2003-10-15 Installation pour surveiller la position d'un piston Withdrawn EP1416160A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0163702A AT412672B (de) 2002-10-30 2002-10-30 Monitor zur überwachung der bewegungsbahn eines hubkolbens
AT16372002 2002-10-30

Publications (2)

Publication Number Publication Date
EP1416160A2 true EP1416160A2 (fr) 2004-05-06
EP1416160A3 EP1416160A3 (fr) 2009-08-26

Family

ID=32075002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03450229A Withdrawn EP1416160A3 (fr) 2002-10-30 2003-10-15 Installation pour surveiller la position d'un piston

Country Status (5)

Country Link
US (1) US7007563B2 (fr)
EP (1) EP1416160A3 (fr)
JP (1) JP4278483B2 (fr)
CN (1) CN100406839C (fr)
AT (1) AT412672B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2012013A1 (fr) * 2007-07-03 2009-01-07 Thomassen Compression Systems B.V. Compresseur de gaz à pistons
DE102005020876B4 (de) * 2004-05-14 2010-02-18 Komatsu Ltd. Wegmessvorrichtung
EP2365221A3 (fr) * 2010-03-03 2013-11-27 BSH Bosch und Siemens Hausgeräte GmbH Compresseur linéaire
EP3246568B1 (fr) * 2016-05-17 2019-08-14 Kaiser Aktiengesellschaft Système de pompe
CN113840760A (zh) * 2018-12-27 2021-12-24 尼尔·齐木 可调节制动杆传感器系统

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20011757A1 (it) * 2001-08-09 2003-02-09 Nuovo Pignone Spa Mezzi di collegamwnto tra asta e testa a croce in un compressore alternativo
DE102005054593B4 (de) * 2005-11-14 2018-04-26 Immobiliengesellschaft Helmut Fischer Gmbh & Co. Kg Messonde zur Messung der Dicke dünner Schichten
US7418355B2 (en) * 2006-01-03 2008-08-26 General Electric Company Method and system for monitoring a piston rod
DE102007059589A1 (de) * 2007-12-11 2009-06-18 Man Diesel Se Vorrichtung und Verfahren zur Erfassung einer Drehlage, insbesondere eines oberen Totpunktes, einer Kurbelwelle einer Hubkolbenbrennkraftmaschine
US8550983B2 (en) * 2009-01-06 2013-10-08 Youngtack Shim Dynamic control relaxing systems and methods
JP5414115B2 (ja) * 2010-01-21 2014-02-12 サンデン株式会社 可変容量型圧縮機の容量検出装置およびそれを備えた可変容量型圧縮機
US9909601B2 (en) * 2010-11-16 2018-03-06 Illinois Tool Works Inc. Motor control
CN104296930B (zh) * 2014-10-24 2016-07-20 武汉理工大学 一种液压往复动密封状态监测传感器
CN115176084A (zh) * 2020-02-28 2022-10-11 伊利诺斯工具制品有限公司 活塞监测组件
CN112796986B (zh) * 2021-01-13 2022-07-19 合肥通用机械研究院有限公司 可模拟往复泵实际运行工况的缸套及活塞密封试验装置

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DE2543078A1 (de) * 1975-09-26 1977-03-31 Vibro Meter Ag Messanordnung mit induktivem abstandsgeber
US4385297A (en) * 1980-01-14 1983-05-24 Schmitt Wilhelm E Arrangement for sensing proximity of a reciprocating member
JPS62151703A (ja) * 1985-12-25 1987-07-06 Osaka Gas Co Ltd ピストン用シ−ル材の摩耗量測定装置
EP0903558A1 (fr) * 1997-09-18 1999-03-24 Enidine GmbH Arrangement d'un détecteur de position dans une unité piston-cylindre
EP1171711A1 (fr) * 1999-04-19 2002-01-16 Leybold Vakuum GmbH Organe de commande a piston oscillant

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EP1489385B1 (fr) * 2003-06-11 2016-07-20 FTE automotive GmbH Dispositif pour détecter la position axiale d'un premier corps se deplaçant relativement à un second corps
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1965892A1 (de) * 1969-04-01 1971-02-04 Essers Dr Ing Ulf Kolbenmaschine mit Messvorrichtung fuer die Kolbenquerbewegung und das Kolbenlaufspiel
DE2543078A1 (de) * 1975-09-26 1977-03-31 Vibro Meter Ag Messanordnung mit induktivem abstandsgeber
US4385297A (en) * 1980-01-14 1983-05-24 Schmitt Wilhelm E Arrangement for sensing proximity of a reciprocating member
JPS62151703A (ja) * 1985-12-25 1987-07-06 Osaka Gas Co Ltd ピストン用シ−ル材の摩耗量測定装置
EP0903558A1 (fr) * 1997-09-18 1999-03-24 Enidine GmbH Arrangement d'un détecteur de position dans une unité piston-cylindre
EP1171711A1 (fr) * 1999-04-19 2002-01-16 Leybold Vakuum GmbH Organe de commande a piston oscillant

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005020876B4 (de) * 2004-05-14 2010-02-18 Komatsu Ltd. Wegmessvorrichtung
EP2012013A1 (fr) * 2007-07-03 2009-01-07 Thomassen Compression Systems B.V. Compresseur de gaz à pistons
EP2365221A3 (fr) * 2010-03-03 2013-11-27 BSH Bosch und Siemens Hausgeräte GmbH Compresseur linéaire
EP3246568B1 (fr) * 2016-05-17 2019-08-14 Kaiser Aktiengesellschaft Système de pompe
CN113840760A (zh) * 2018-12-27 2021-12-24 尼尔·齐木 可调节制动杆传感器系统
EP3902726A4 (fr) * 2018-12-27 2023-04-05 Msns, Llc Système de capteurs de levier de frein réglable

Also Published As

Publication number Publication date
AT412672B (de) 2005-05-25
EP1416160A3 (fr) 2009-08-26
JP2004151098A (ja) 2004-05-27
ATA16372002A (de) 2004-10-15
US7007563B2 (en) 2006-03-07
JP4278483B2 (ja) 2009-06-17
CN100406839C (zh) 2008-07-30
CN1499169A (zh) 2004-05-26
US20040083831A1 (en) 2004-05-06

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